Smoke-consuming furnace



. (mlivlodeL) NGEL.

SMOKE GONSUMING FURNACE.

No, 524,317. Patented Aug. 14, 18-94.

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UNITED STATES I T NT OFFICE.

HENRY ENGEL, OF WEST CLEVELAND, ASSIGNOR E ONE-HALF TOAUGUST c. YILG, OF CLEVELAND, OHIO.

SMOKE-CONSUMING FURNACE.

SPECIFICATIQN forming part of Letters Patent No. 524,317, dated August 14, 1894.

Application filed March 17, 1894- Serial No. 504,016. (No model.) I

Furnaces; and I do hereby declare the fol-= lowing to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in smoke-consu ming furnaces or smoke-consumers; and it consists in certain features of construction and in combinations of parts hereinafter'described and pointed out in the claims;

, Inthe accompanying drawings, Figure 1 is aside elevation, mostly in longitudinal sec tron, of a furnace embodying my invention, portlons being broken away to more clearly show the construction. Fig. 2 is an endelevation in vertical section on line 2--2, Fig. 1. F g. 3 is an enlarged detail in section.- Fig. 4 IS an enlarged elevation in detail, partly in section.

A designates the boiler of my improved furnace, the same being shown to be of the horizontally-arranged tubular variety and supported between the upper portions of the side-walls B of the furnace-setting in the 'usual manner.

1 Q designates the fuel or fire-chamber of the furnace, said chamber being shown located under the forward portion of the boiler,

tion with a chamber I at the rearof the boiler,

and said chamber I is in open relation with the tubes of the boiler.

. furnace with pipes L discharging hot air or A flue or channel K is formed at and preferably within the side-wall or walls of the furnace-setting, one of said channels or fines being preferably provided in each of said walls as shown in Fig. 2. Flues or channels K are arranged lengthwise of the furnace and extend preferably from above the fuel-chamber rearwardly beyond said chamber along the path of the products of combustion. Flues or channels K are in open relation, respectively, with the fuel-chamber of the furnace by means of holes or short ducts K, communication between said chamber and channels or flues K being preferably established by a series of said holes or ducts K arranged at suitable intervals lengthwise of thechannels or flues forward of the bridge-wall. Open relation is also established between chamber H and fines or channelsK preferably by means of lateral holes or short ducts K any suitable number of said holes or ducts being provided and the same being preferably arranged at suitable intervals lengthwise of. channels or flues K rearward of the bridge-wall.

A pipe L extends into the rear end of each flue or channel K, said pipe extending preferably forwardly to the central portion of the respective fine or channel and terminating, at its forward end, in a discharging-nozzle L1. Pipes L L are adapted to conduct and discharge hot air or steam into the central por tion of the respective flue or channel K, preferably within that portion of the respective flue or channel that is located next adjacent to the bridge-wall, and I would here remark that pipes L extend preferably somewhat forward of the most forward duct or passage-Way K as shown at I, in Figs. 1 and 3. By'the construction hereinbefore described it will be observed that in the operation of the steam into the central portion of the respective flue or channel K, suction will be created at holes or ducts K resulting in the establishment of a circulation or currents inthe dir'ection of the arrows, that is, from" the fuelchamber rearwardly into chamber H, or the path of the products of combustion rearward of the fuel-chamber; thence through holes or ducts K into fiues or channels K; thence Ioo forwardly through said fines or channels to holes or ducts K and thence into the fire or fuel-chamber. Hence, it is obvious that the smoke passing from the fuel or lire-chamber to chamber H over the bridge-wall will be sucked into fiues or channels K at holes or ducts K and will thence be carried forwardly along said flues or channels and discharged into or returned to the fuel or firechamber at holes or ducts K, by which circulation the smoke is completely consumed, and has no opportunity to escape. The greatest economy in fuel is therefore obtained by my improved furnace and in a manner that is exceedingly simple and convenient.

I would here remark that if flues or channels K are built of metallic tubes they are preferably built in two sections with the rearward section fitting snugly into the rear end of the forward section, as shown at K in Fig.

3, by which construction it is obvious that the burning out of the forward sections of such metallic flues would not necessitate the renewal of the entire fiues.

If the suction at holes or ducts K is created by the discharge of hot air from the discharging-nozzle of pipes L, said pipes aresuitably connected with a hot-air-supplypipe L shown in dotted lines, Fig. 1. If steam is used, however, the pipes are suitably connected, by means of pipe L with the. steamfspace of the boiler, as shown in solid lines, Fig. 1. Pipes L, preferably just outside of the rear end of the furnace are provided, respectively, with a valve Z for regulating the supply of air or steam to the respective pipe. Suitable mechanism is preferably provided for operating said valve from the front end of the furnace. Said valve-actuating-mechanism consists preferably of a pinion Z operativel y connecting with the stem Z of the valve, and meshing with a reciprocating-rack M that is arranged vertically, and is operativelyconnected, at its upper end, with a chain or cable N that leads over suitable guide-sheaves or pulleys N to the forward end of the furnace and to Within convenient reach of the operator and is adapted to be held in the desired adjustment by. means of an eye or ring, N attached to the forward end of the chain or cable and adapted to engage any one of hooks, O, secured at diiferent elevations, respectively, to the furnace-front. The lower end of rackM is operatively connected in any approved manner with a piston or plungerP that is hollow or chambered, as at P, for receiving weights Q. Piston or plunger P is adapted to operate within an upright cylinder R that, at its lower end, is connected with a pipe, S, for supplying air or fluid to the cylinder below the piston or plunger to assist in elevating the plunger or piston and in holding the same at the desired elevation. Pipe S (see Fig. 4) is shown provided with a check or back-pressure-valve S to prevent the return of fluid from the cylinder, and the cylinder is shown provided with a pet-cock, T,

for permitting the escape of fluid from the cylinder when desired. 0

By the construction just described, it w1ll be observed that the rack M, and consequently the air or steam-supply regulatingvalve with which it is operatively connected, is actuated in the one direction or theother to close or open, or more or less close or open said valve according as the aforesaid piston or plunger is elevated or lowered within the inclosing cylinder, and the arrangement of parts is preferably such that said piston or plunger shall be elevated by pulling downwardly upon chain or "cableN at the forward end of the furnace, and that said piston or plunger is lowered by loading its chamber with any suitable weights, or by opening the pet-cock to permita portion of air in the cylinder to escape, orboth.

Reissued United States Letters Patent No. 10,044, of February 28, 1882, to Elliott, and

United States Patent No. 353,216, of November 23, 1886, to Grewcox and Yeiter, disclose that it is not broadly new to establish a current from the fuel-chamber beyond said chamher in'the path of the products of combustion, and thence back into said chamber, and I do not, therefore, desire to be understood as claiming, broadly, means whereby such a cu rrent is'established.

The object of my invention is to arrange fines or passage-ways K approximately the entire length of the furnace and to provide said dues or passage-ways, rearward of the bridge-wall and at comparatively short intervals, with suction-holes or ducts whereat the smoke or products of combustion is drawn into said fines or passage-ways, and to provide said fiues or passage-ways for-ward of the bridge-wall and at comparatively short intervals, with similar holes or ducts for discharging, into the upper part of the fire or fuel-chamber, thesmoke or products of combustion drawn into the fines or passage-ways rearwardly of the bridge-wall.

The accompanying drawings illustrate flues IIO K as extending beyond the rear end of the boiler at the top of the bridge wall, and the portion of said fines or passage-ways rearward of the bridge-wall is provided with suctionholes or ducts K at comparatively short intervals from at or near the bridge-wall, to and beyond the rear end of the boiler, by which construction the smoke and products of com bustion passing over the bridge-wall from the fuel or fire-chamber are bound to be sucked or drawn into said fines or passage-ways owing to the provision of suction-holes or openings K along the entire path of the smoke or products of combustion between the bridge wall and the rear end of the boiler; hence, there is little liability of any smoke escaping into the tubes of the boiler. Also, heating-pipes L, that extend into flues or passage-ways K, maintain said passage-ways in a highly heated condition, and hence the smoke and gases conducted through said flues orpassage-ways back into the fire or fuel-chamber, are kept and returned in a heated condition to the fire or fuel-chamber.

What I claim is V 1. In a s1noke-consuming furnace, the combination of the fuel-chamber, bridge-wall at the rear of the fuel-chamber, two lines or channels arranged at opposite sides of the furnace, respectively, a suitable distance above the grate-surface of the fuel-chamber atthe top of the bridge-wall, said flues extending from the forward end of the furnace rearwardly a suitable distance along the path of the products of combustion rearward ofsthe bridge-wall, said fines or channels rearward of the bridge-wall being provided at comparatively short intervals with suction-holes or ducts, and, forward of the bridge-wall and at comparatively short intervals, having discharging-openings thatidischarge into the upper part of the fuel-chamber, and suitable means for establishing a current from the path of the products of combustion rearward of the bridge-wall into the aforesaid fines or channels at the suction-holes, thence forwardly through said flues or channels into the fuelchamber at the discharging-holes in said dues or channels, substantially as set forth.

2. In a smoke-consuming furnace, the combination of the fuel-chamber, bridge-wall at the rear of the fuel-chamber, two fines or channels arranged at opposite sides of the furnace, respectively, a suitable distance above the grate surface of the fuel-chamber atthe top of the bridge-wall, said fiues extending from the forward end of the furnace rearwardly a suitable distance along the path of the products of combustion rearward of the bridge-wall, said fines or channels rearward of comparatively short intervals having? ducts and forward of the bridge-walls an charging-openings that discharge intothe upper part of the fuel-chamber, and a hot air or steam-pipe leading into the rear portion of said fluesand extending forwardly and d1scharging at or near the bridge-wall, all arranged substantially as shown, for the purpose specified.

' 3. In a smoke-consuming furnace, the combination with the fuel chamber, flues or channels K K arranged a suitable distance above the grate-surface of the fuel-chamber, said fluesextending from above the grate-surface rearwardly a suitable distance beyond the fuel-chamber along the path of the products of combustion, the forward portion of said" fines being in open relation with the fuel- I chamber, and the rearward portion of the flues communicating with the path of the products of combustion rearward of the fueLchamber, of a hot air or steam-pipe leading into the rear portion of each of said fiues and discharging forwardlyinto the respective flue, a valve for regulating the supply of fluid to said pipe, a

cylinder, a chamber or hollow piston adapted to operate endwise of said cylinder and operatively connected with the aforesaid valve, a valved pipe for' conducting fluid to the cylinder below the piston, and apet-cock for permitting the escape of fluid from the cyli-nder, substantially as shown and described.

In testimonywhereof I sign this specification,in thepresence of two witnesses, this 1st day of'February, 1894:.

HENRY ENGEL. Witnesses:

O. H. DORER, WARD HOOVER. 

